Because they are relatively low in number compared to more popular monster types, there is no one specific theme or strategy common to them, though many have effects that assist them during the Battle Phase
From fantasy, to horror, science fiction and even sports, card game lovers have had access to a variety of different collectible card games that allow them to interact with others in a strategic fashion
What is the rarity of this Leaf card
Maruno, I think the old GBC game worked well enough, BUT there is a japan-only TCG game for the DS
They will teach you the basics of the game with a deck that best encapsulates what playstyle each color tends to have, but that is just the beginning of your journey to becoming the King of the Pirates
At the LGS I've been playing at for the past few years, one of the store owners plays a very strong Marath deck