What's the deal with Jellyton?

[some (momi)]

It doesn't have the full 10 energy slots, but it doesn't appear that it can evolve into anything (there's no space in the bestiary beneath it, anyways).

[LanceEteryu]

Not every beast has a remaster, but make up for it with some rather potent stats or abilities, usually.

[Fortuna]

There's a couple of fully remastered creatures without the full 10 slots as well.

Jellyton I believe is generally more of a gimmick type of monster. It can dish out poison very easily due to the passive it gets, another one makes it immune to burn which neutralises the one debuff weakness Poison has while making two other types crit on it. It's rather interesting to use, though tricky to use well because it does tend to crumple under focused attacks.

[TwilightDusk]

Jellyton is a standalone beast whose stats are overall lower than most fully evolved beasts (total of 700 vs. the usual of 800). The design seems to be that it makes up for it with two unique passives, Acid Reflex and Liquid Body, and overall its stats are designed to be a glass cannon type with high speed and attack stats, particularly ranged attacks (though the somewhat lower melee attack can trigger Acid Reflex proactively to make up for the lower damage), but lower HP and defenses.

Of particular note, it can learn Boil, a melee attack with a chance to inflict burn, making it capable of inflicting both Poison and Burn in the same attack. (Khufo can do the same with the Radioactive passive and Toxic Stab, but Radioactive is a rarer sticker to find).