Credit goes to Wolfdemon21

Mars getting extra excited decided to actually monitor that wall and noticed a Tyrantrum, an S rank Outlaw known to flatten pokemon and mailing them to far off places. Feeling extra giddy went right ahead and captured that Tyrantrum, which made his diaper extremely bulky.
The others were actuallly terrified to try and escape, so they didn't
Mars got the attention of a Charmeleon one of the prison's staff. He was surprised to notice a Lugia and in suck a thick diaper. Mars told the charmeleon about an almost prison break and pointed to the hole in the wall.

The charmeleon impressed that one so young captured some dangerous outlaws decided to give him a chance and would introduce him to an Alakazam named Judge, who works with the Prison's current warden, Mako Venom.

End

Mars belongs to me
Pokemon belong to Game Freak