Because it isn't a planeswalker itself, it won't enter the battlefield with any loyalty counters, but it also won't die because due to not having any
Banned Pairs of Cards in One Piece There are also some cards in One Piece which are not banned from using on their own, but cannot be used together
If your starting deck follows that rule, then the creature can serve as your chosen companion." The Wiki goes on to explain how you can only have one companion in a game, it starts outside the game, and counts towards your sideboard size (i.e., in Constructed play it is one of the fifteen cards in your sideboard)
The new cards include Lugia, Ho-Oh and Suicune ex cards, alongside Sun Seed, Scorching Charcoal, Drops in the oceans and a Mr Mime card that has only been available in Japan up until now
Grapeshot If theres a storm deck thats viable and competitive, it plays Grapeshot as a wincon