Yup, this is the Pokmon TCG Pocket version of the process of evolving Gimmighoul in the mainline Pokmon games and Pokmon Go, which involves collecting 999 Gimmighoul Coins
That alone makes it an amazing card, but it also can flip and set cards already on the field, setting their monsters' effects up to activate during the next turn or during the opponent's turn if they think they can destroy it
Its ability is even worse, you must pay three mana and discard a card, the ultimate loss of card advantage, just to give it a temporary +1/+2 boost
It took ten years for them to finally make a card arguably stronger than Jace, the Mind Sculptor (and even this head-to-head is a challenging one to call, as I can imagine a lot of formats where Jace is better)
Choose your favorite or collect them allno matter what you decide, these Mini Tins put Pokmon favorites in the palm of your hand