Most of the time, higher tier monsters have all the abilities of preceding tiers, with increased intensity.
Jelly Traits by Tier
All Tiers
Jelly cubes are seemingly harmless, gelatinous and bouncy cubes that appears from the start, in the Crash Site. In Tier 1, they are as harmless as their looks would suggest, but gains an often-missed Thorn Attack in Tier 2 and onward, making it far more dangerous. This family of monsters is also home to 2 of the game's bosses, the Royal Jelly (often called the Jelly King), and the Ice Queen.
Strategy
Guide: Jelly Combat
Part of the reason why Jellies are such a challenge in later tiers is down to the fact that they are one of the few monsters in the game to never "face" who they are aggressing against, as they are always facing towards the screen. Because of this, a Jellies' movements are often difficult to predict regarding who the Jelly is aggressing against, especially when they are about to use their standard tackle attack or when surrounded by them while in a Team.
Before a Jelly uses its tackle attack, it will track your Knights movements before lunging forward. The easiest way to avoid this is to shield, hit it with any form of knock back (the third strike on any 3-strike sword, heavy swords, charge attacks or shield-bumps) or to simply keep strafing away from it.
However when dealing with a large group of Jellies this may be a little more difficult - so it may be a good idea to keep them walking in a straight line, or in a circle around a large area. The Brandish swordline's charge attacks are particularly effective against a large group, as the sword swing and explosions will push them back and deal multiple hits of damage.
In T2 and T3, Jellies gain the ability to use a Thorn attack under a Knight's feet (which complements the thorns they gain in these levels), which are often slightly difficult to spot. However, this thorn attack leaves the Jelly open to close-range attacks.
Royal Minis and Jelly Green Minis can be a true nightmare if you allow them to build up their numbers. A mini jelly swarm can individually deal a relatively large amount of damage for their size, in addition to being able to block your movement, your attacks, charge attacks, as well as easily breaking your shield if all attack at once. Thankfully, due to their incredibly low amount of health, a good sword will make easy work of them.
Quick Glance Gear:
Pending
Notes
Rock Jelly Cube in Lockdown match
As a Rock Jelly Cube can spawn in the place of any stone block, there is a chance of finding one during any Lockdown match that includes stone blocks.
Nick's avatar on the forums, as shown by his statue in the Haven Town Square garden, is an Impostocube.
Jelly Cubes are the first monsters encountered in the tutorial levels and hence in the entire game.
The Jelly Green Giant alludes to the Jolly Green Giant vegetable marketing mascot. In general, jelly cubes bear much similarity to the Gelatinous Cubes found in the Dungeons and Dragons Monster Manual.
Blast Cubes originally had a powerful explosive detonation with a powerful knockback upon being defeated. This was later stealth patched, completely removing this function.
History
This monster has been encountered since release 2011-04-04 when the game officially launched.
Jelly Cubes are small, barely sentient cubes of jelly that can do nothing more than shuffle their way over to their prey and attempt to bludgeon them with their squishy bodies.
Notes
Backsteps after attacking in Tier 1.
Acquires a thorn attack in Tier 2.
Can raise three thorns at a time in Tier 3.
They are often found wedged between various blocks in the world.
Combat
Tackle
Thorn Attack
Loot is dropped when the monster is defeated. The loot that drops is random. Sometimes loot isn't dropped at all. This list is simply a pool of possible loot.
Random spawns also apply to missions with floors that have geography similar to the relevant arcade area. The normal version of a monster can sometimes spawn instead of the status version in areas themed with a status, unless the spawn is guaranteed. See Gate Maps for details.
Encounter
Random Spawn
This monster has a very high chance to spawn in these areas:
Ice Cubes that are set on fire become normal Jellies that only possess a normal damage tackle.
Notes
They refreeze if an ice cube attacks near them or if you inflict freeze on them. Like other Freeze themed monsters, this enemy is immune to frezee. It behaves like the others. See above strategy for combat and equip effective gear.
Combat
Tackle
Thorn Attack
Vapor
Loot is dropped when the monster is defeated. The loot that drops is random. Sometimes loot isn't dropped at all. This list is simply a pool of possible loot.
Random spawns also apply to missions with floors that have geography similar to the relevant arcade area. The normal version of a monster can sometimes spawn instead of the status version in areas themed with a status, unless the spawn is guaranteed. See Gate Maps for details.
Encounter
Random Spawn
This monster has a very high chance to spawn in these areas:
An explosive Jelly Cube that mimics a timed blast block when defeated. The initial explosion causes no damage.
Notes
Explodes when dead damaging knights within a one-tile radius in Tier 1.
Scatters goo when it dies in Tier 2 which detonates a short time later. However the cube loses its ability to detonate itself.
Scatters goo and detonates when it dies in Tier 3.
Combat
Tackle
Goo Explosion
Loot is dropped when the monster is defeated. The loot that drops is random. Sometimes loot isn't dropped at all. This list is simply a pool of possible loot.
Random spawns also apply to missions with floors that have geography similar to the relevant arcade area. The normal version of a monster can sometimes spawn instead of the status version in areas themed with a status, unless the spawn is guaranteed. See Gate Maps for details.
Encounter
Random Spawn
This monster has a very high chance to spawn in these areas:
A miniature version of the Jelly Cube that can pack quite a punch. They are usually found in groups or spawn on a spawn tile.
Notes
They are only found in Red Carpet Runaround and some danger rooms as of now. They also appear to have a very low defense, taking much more damage from weapons.
Combat
Tackle
Loot is dropped when the monster is defeated. The loot that drops is random. Sometimes loot isn't dropped at all. This list is simply a pool of possible loot.
Loot
This monster does not drop loot.
Random spawns also apply to missions with floors that have geography similar to the relevant arcade area. The normal version of a monster can sometimes spawn instead of the status version in areas themed with a status, unless the spawn is guaranteed. See Gate Maps for details.
Encounter
Random Spawn
This monster has a low chance to spawn in these areas:
These small purple cubes populate the Royal Jelly Palace in large numbers. These jellies are individually weak, so they usually come in large numbers or come with other regular-sized Jellies.
Notes
Their hitboxes are very small, so gunners will have a hard time shooting them down.
Combat
Tackle
Loot is dropped when the monster is defeated. The loot that drops is random. Sometimes loot isn't dropped at all. This list is simply a pool of possible loot.
Loot
This monster does not drop loot.
Random spawns also apply to missions with floors that have geography similar to the relevant arcade area. The normal version of a monster can sometimes spawn instead of the status version in areas themed with a status, unless the spawn is guaranteed. See Gate Maps for details.
A frosty Mini which can pack quite the punch so cold, it can leave you frozen still, literally.
Notes
This monster behaves like the others. See above strategy for combat and equip effective gear.
Combat
Tackle
Loot is dropped when the monster is defeated. The loot that drops is random. Sometimes loot isn't dropped at all. This list is simply a pool of possible loot.
Loot
This monster does not drop loot.
Random spawns also apply to missions with floors that have geography similar to the relevant arcade area. The normal version of a monster can sometimes spawn instead of the status version in areas themed with a status, unless the spawn is guaranteed. See Gate Maps for details.
Unlike its jelly relatives, the Rock Jelly Cube has come prepared. With a stone block atop its even larger grey body, it has a greater force behind it when it tackles.
Notes
While among stone blocks this Jelly can easily disguise itself, so beware when clearing blocked paths!
Combat
Tackle
Loot is dropped when the monster is defeated. The loot that drops is random. Sometimes loot isn't dropped at all. This list is simply a pool of possible loot.
Random spawns also apply to missions with floors that have geography similar to the relevant arcade area. The normal version of a monster can sometimes spawn instead of the status version in areas themed with a status, unless the spawn is guaranteed. See Gate Maps for details.
Encounter
This monster has a low chance to appear in place of any Stone Block even during Lockdown.
The Impostocube is a dressed up variation of the Jelly Cube. It rarely drops related accessories when defeated.
Notes
The Impostocube used to always drop a gold crown (coin), but this seems to no longer be the case.
Combat
Tackle
Loot is dropped when the monster is defeated. The loot that drops is random. Sometimes loot isn't dropped at all. This list is simply a pool of possible loot.
Random spawns also apply to missions with floors that have geography similar to the relevant arcade area. The normal version of a monster can sometimes spawn instead of the status version in areas themed with a status, unless the spawn is guaranteed. See Gate Maps for details.
Encounter
This monster has a low chance to appear in place of any normal size Jelly Cube, including a Rock Jelly Cube that would've spawned from a block.
This monster behaves like the others. See above strategy for combat and equip effective gear.
Combat
Tackle
Spawn Jelly Green Minis
Loot is dropped when the monster is defeated. The loot that drops is random. Sometimes loot isn't dropped at all. This list is simply a pool of possible loot.
Loot
This monster does not drop loot.
Random spawns also apply to missions with floors that have geography similar to the relevant arcade area. The normal version of a monster can sometimes spawn instead of the status version in areas themed with a status, unless the spawn is guaranteed. See Gate Maps for details.
Event Mission: Save Winterfest!. He also helped Spiral HQ to locate the base of operations of the Grinchlins during the replayable 
