Card types are called Rarity in Homerun Clash.
The Rarities are divided by Normal/ Minor/ Major/ Allstar, and the cards with different Rarity have different MAX LEVEL.
Normal - 20 Lv
Minor - 15 Lv
Major - 10 Lv
Allstar - 8 Lv
The amount of card requirement to hit MAX LEVEL differs by its Rarity.