The trading card game (and the franchise as a whole) tends to hang more on the 'soft cute tiny baby' aspect of Cleffa more than the 'intergalactic star monster' thing and, well, who can blame them
Cards like Mizzix's Mastery let you cast those expensive instants and sorceries with cycling abilities from your graveyard for free after you discarded them earlier
Others allowed you to pay colored mana (Skizzik, Thicket Elemental), and even colored mana different from the spells cost (Vigorous Charge, Verduran Emissary)
If this Pokmon is in the Active Spot and is Knocked Out by damage from an attack from your opponent's Pokmon, flip a coin
Any "as [this permanent] enters the battlefield" or "[this permanent] enters the battlefield with" abilities of the copied card will also work
Cards in P labeled promo sets use one of two standard promo symbols