In the early game, forcing your opponent to cast a creature two turns in a row can provide you with a time advantage
In tournament, as long as you have at least one Basic Pokmon card in your deck, you can't be punished for playing an impossible evolution cards (like Riolu+Lucario with M Lucario- EX ), you would just have cards in your deck that you are not able to play under any circumstances (you can't put M Lucario- EX into play without Lucario- EX )
What cards are similar to Atalan Jackal
4 is a good average since most of the time you usually hold onto at least 2 supporters, but unlike the draw 4 supporters which the draw 4 is guaranteed this card has the possibility to draw 0 cards or even in some cases not be able to be played at all if your opponent doesn't have any cards in hand, just use iono and professor's research
If youre all about the cards, go Bundle
Pokmon and One Piece cards use the common standard TCG format of approximately 63 88 mm