Original sentence: Changes into a monster:  This could simply be a 'unique' ability, but some likey references could be: Gremlins (movie); Beast Boy of DC Comics; a Monsters, Inc.Overall his powers seem to be on a need-to-use basis.Super Strength (when he breaks out of his crib):  Take your pick on any superhero, but most likely Superman;  Note: It could be considered a 'mistake' that Jack-Jack didn't simply teleport or phase out of the crib, but he may have simply not 'discovered' he even had that power yet since this was before he phased out of his diaper
Edited sentence: Changes into a monster:  This could simply be a 'unique' ability, but some likey references could be - Gremlins (movie); Beast Boy of DC Comics; a Monsters, Inc.Overall his powers seem to be on a need-to-use basis and closely resemble genuine 'powers' that most babies do seem to posess:  Disappearing, getting from points A to B in the blink of an eye, hard to catch, differing levels of 'heaviness', quick destruction of household items, and of course they can turn into a little monster at a moment's notice.Super Strength (when he breaks out of his crib):  Take your pick on any superhero, but most likely Superman;  Note: It could be considered a 'mistake' that Jack-Jack didn't simple teleport or phase out of the crib, but he may have simply not 'discovered' he even had that power yet since this was before he phased out of his diaper