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Brought Down to Normal: Brought on by a witch.Brilliant, but Lazy: His shapeshifting powers could easily allow him to defeat most enemies if he used them strategically, but he's far too lazy to learn to use them to their fullest.Big Little Brother: He might be slightly younger or the same age as Finn (he was a puppy when Finn was a toddler), but he's clearly taken the big brother role, along with being his general protector.The Big Guy: Given that he's a Sizeshifter, he definitely qualifies.Big Friendly Dog: Sometimes he's big but he's always friendly.Big Eater: When given a choice of weapons, he chooses sandwich over sword.Big Brother Mentor: Sometimes acts as one to Finn.The last season even suggests that he denies his own emotional well-being and processing of trauma in order to put on a brave face for Finn and protect him. He even claims to have a ∿inn sense that tells him when Finn is about to cry, and the angriest we ever see him is when hes ripping a new one into Princess Bubblegum for breaking Finns heart. He's not as physically protective as most examples of this trope, but he is very tuned into Finns emotional well-being, and hurting his little brothers feelings is the surest way to get on Jakes bad side.
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For example, when Finn broke his videogame console as punishment for ignoring training, his response was to declare he was going to break every bone in Finn's body and tried to do just that. He's also a shape-shifting part-alien Animalistic Abomination and Reformed Criminal who can be insanely dangerous when provoked and has no problems with killing threats. Beware the Silly Ones: He's for the most part a pretty lackadaisical and apathetic guy who likes a great meal, sleeping, jokes, and fun times with his friends and loved ones.Beta Couple: Becomes part of one with Lady Rainicorn.Badass Adorable: He's a shape-shifting dog who's super flexible and makes the cutest faces.An Axe to Grind: Though it's not very necessary.(looks at the ground, gasps) A dancing bug! Jake: (giving his sandwich to BMO) Take my sammich, BMO.