As long as you draw a Pikachu ex card in the first or second turn, you can reliably deal 90 damage in a turn with Pikachu ex's Circle Circuit attack without relying on coin flips or Supporter cards
The effect is that when the opponent destroys it, unless there is a special summoning restriction, he will not only stay in the deck, but also monsters will pop out from the extra deck, which is a pretty exciting effect
If you're wondering which of your favorite card monsters reference your favorite shows then stick around for this list
Finding enough ways to bounce the ring to your hand will be a bit difficult, but if you're also willing to sacrifice it and return it from your graveyard, things get a whole lot easier, even in colorless
What cards have I overlooked that you think will be good
Whenever you cast a creature spell, if it has mutate, draw a card, then discard a card