TigerShark

TigerShark is the macot of the game, similar to Pikachu from Pokemon. While not a main Invizimal, it was pronounced a mascot because of its unique fantasy appearance. The TigerShark gets it's name from being a combination between both a tiger and shark, creating a miniature battle monster that resembles a tiger-patterned shark with limbs and claws.

How to Capture
Once completed with the main story, return to Campbell's Castle and watch Jazmine's cutscene. In it, she explains that there was an old legend in India about TigerSharks, and she wants you to find one. Return to Mumbai and battle the new opponent, Eskimo. He will have a TigerShark (sometimes a Mutant.) If you defeat the level 1 TigerShark pup, you can obtain it.

Forms
Tigershark in his pup form resembles an ordinary shark (albeit orange and with stripes) with four legs, which it runs upon. When older and a Colt, it is slightly larger with electric prongs appearing from his back, giving his attacks an electric shock and effect. When it is evolved to the maximum level, the Tigershark walks on two legs, it's muscles grow considerably, it grows more fins, and it's entire body now controls electricity.

Strength in Battle
Tigershark is quite the high attacker, and, despite his position in the game, he is quite the basic Invizimal as well. When raised right, he will be well-rounded, but with slightly higher attack than usual.

Trivia

 * Tigershark is featured in the game like the strongest Invizimal, but it is not. It is actually quite basic on itself.
 * Tigershark could be considered the final Invizimal obtained, other than (possibly) Boneshell and Moby.