Backstory:

He is not very smart, he is able to jump reasonably high, he has a boomerang that he always counts on, he is a superhero duo with Pumpio, in which he is the leader, despite both being terrible at being superheroes they try their best.

Encounter Text:

Pu: We are here...
Sk: To defeat the evil!

Pu: But who...
Sk: Is the evil?

Pu & Sk: That is you!

Check Text:

[Neutral/pacifist]

*Skullio the kangaroo superhero.
*I don't know if he is playing or being serious.

[Genocide]

*Skullio the kangaroo superhero.
*Superhero? Then let's show him a supervillain.