Shedinja - Psychic - HP60
Stage 1 - Evolves from Nincada

Ability: Fragile Shell
If this Pokémon is Knocked Out by damage from an attack from your opponent's Pokémon ex, your opponent can't take any Prize cards for it.

[P] Damage Beat: 20x damage. This attack does 20 damage for each damage counter on your opponent's Active Pokémon.

Weakness: Darkness (x2)
Resistance: Fighting (-30)
Retreat: 0

It's bad going into a format where you need to ohko 380hp pokemon. It doesn't even have good synergy with the ninjask.

Ninjask - Grass - HP80
Stage 1 - Evolves from Nincada

Ability: Cast-off Shell
When you play this Pokémon from your hand to evolve 1 of your Pokémon, you may search your deck for Shedinja and put it onto your Bench. Shuffle your deck afterward.

[G][C] U-turn: 90 damage. Switch this Pokémon with 1 of your Benched Pokémon.

Weakness: Fire (x2)
Resistance: None
Retreat: 0