Jake is absent-minded. Normally it is for comic relief, but it has posed problems for Finn and Jake, like in Party Animal. I believe it stems from a mental disorder, like ADD.
He also has memory problems, being quite fickle and losing his place mid-conversation constantly. Great of this is when he told Finn to stay away from Tier 15, and then three episodes later it is revealed that Lady Rainicorn is going to have kids. He even forgot how he got his stretchy powers. This could also stem from his ADD.
Jake ages faster than Finn, but slower than his children. He says in James that he thought he would out live at least one of his children or Lady. This proves he is probably going to die before Finn. (Unless my Finn sacrificing himself theory is right.)
Jake can adjust his metabolism. This is why he can eat huge amounts of food and can just shrink down to eat some more.
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Adventure Time Theories
FanfictionOkay, I wrote this right at the end of the fifth season. These are not baseless assertions; I have researched these and have proof from the show, video games, and comic books. At least for most of them. I made this before the sixth season, so they...
