Jake is the leader of the Animorphs. He doesn't want you to know his last name, until he's ready to tell you it's Berenson.
Jake's known animal forms include a tiger, a grizzly bear, a lizard, a severed T. rex head, and a stingray.
- Jake/Tiger (Deluxe, 1999)
- Part of the first wave of Animorphs toys, Jake transforms from a really unconvincing human into a tiger, as well as a transitional third mode combining features from both. His tiger mode front claws are separate pieces that attach like gloves.
- Jake/Grizzly Bear (Mega, 1999)
- Jake's second toy transforms from a marginally better human into a grizzly bear that looks familiar, as well as a transitional third mode combining features from both. His bear mode front claws are separate pieces that attach like gloves.
- Tri-Rex (Super, 1999)
- This version of Jake was available only in the Tri-Rex giftset, along with Marco and Cassie. The toy has neither a human mode nor a complete animal mode; Jake transforms from a human/dinosaur transitional form into the head, neck, and foreams of Tri-Rex.
- Jake/Stingray (Deluxe)
- The fifth Jake toy transformed from a human with fins on his knees and most of a stingray growing out of his back into a stingray. The stingray chest and tail were removable.
- Although it was planned, this toy was never released in the United States. Because its planned release would have been near the end of the line, this led to a popular perception that it was never released at all, similar to the status of the Beast Machines Megatron toy that eventually became Megatron Megabolt.