One of the more prominent features of the game that is entirely unique to the Pocket version of the Pokmon Trading Card Game is the Wonder Pick function
you could also use things like Silent-Blade Oni, Ink-Eyes, Servant of Oni, and Fallen Shinobi for extra stealing fun, but given that they're Ninjas, they don't work as well without a dedicated Ninja strategy
The most prominent of these revolves around Cloud of Faeries
Tormod, the Desecrator Tormod, the Desecrator can be a handy partner when you have a plan for getting cards out of the graveyard
He can eat a turn one Birds of Paradise, Llanowar Elves and Noble Hierach or he can be used late game to finish off an opponent at low life
Many legendary creatures are designed with this in mind, and this list is filled with famous commanders