In Operation: GALACSIA, he was introduced when Star Wolf caught Dib Membrane in their territory, so Rattlesnake Jake was sent to attack him, and succeeded. When they were called over to the Tallest, Jake shot up and snatched Purple's candy bar, eating it. He was bested by Dib Membrane when they went to fight them, and was later at Planet Food Courtia, demanding some rat guts, which they didn't have. When Star Wolf got into that little fight with Star Fox on Coruscant, Jake fought Slippy.
When Nigel went to Nightmare Land, he went into Jake's greatest fear in the Hall of Fear, and saw his greatest fear was birds. When Nigel and the team fought Star Wolf again, Katie flew by and helped them beat Jake by projecting a holographic image of a hawk. He and Star Wolf attacked Moonbase during The Invasion, in which Jake bit Fanny's leg. On Earth, he was tied into a knot by Sonya after trying to shoot and kill Sector W. Jake then dragged Rachel to the Tallest when they reached the Massive, and tried squeeezing the life out of her, but Nigel arrived just in time. After Ava betrayed her team and handed Red and Purple the Stars, Jake and Star Wolf were betrayed as well and locked away. When they broke out and destroyed the Massive, Jake dragged the Tallest to their doom.
Jake and Star Wolf helped the main group during The Grande Finale. When Nigel defeated Dimentia, Rattlesnake Jake "tipped his hat to him", meaning he now (partially) respects Nigel.
In Truth or Dare: KND Plus Others, Jake and Star Wolf were in the audience during the Bonus Showdown, where Jake was rooting for Nagini.
In The Great Galactic Race, Jake shot off enemies in their Landcrusher before he and Star Wolf crashed into a tree on Planet Flora. Jake was immune to Nova's telepathy due to him being an intelligent animal.
Jake is a huge, black snake with a light-red underside, with yellow eyes, and a black cowboy hat. The tip of his tail is a machinegun.
Jake is a vicious, cold-blooded bounty hunter, and while he follows Wolf's orders, he gets annoyed when Wolf prevents him from doing something. Jake respects people who impress him, such as Nigel when he saved the universe, but it doesn't mean he won't hunt them if he has to. Jake has a fear of birds, but didn't seem afraid of Falco in any way.
As a snake, Jake can easily wrap around enemies and either crush or eat them. He has a machinegun strapped to his tail, which is loaded with many bullets. Since he can't fit in his own Wolfen, he flies around space using a suit designed like a Wolfen, and can launch bombs from his tail.
Jake is afraid of birds, and will slither away in fear at the sight of a menacing bird. His machinegun is also limited on bullets, and if a large magnet were activated, Jake would be pulled to it via his gun-tail.