hala pokemon card Guzma Custom Proxy reveal it Hala (Mega Rising #222/331, 2-Diamonds)

When Champions of Kamigawa came out, maybe a few players had a good time countering a huge spirit spell with it during the pre-release or in sealed pool games

Second, because they can make any mana colour they can be great for getting cards on the board that you just dont have the lands to support, meaning a deck built around them doesnt need to worry if a card outside of its main colours is useful to have

[153] All key people involved with the production of Pokemon were well-experienced and had proven track records within Japan's anime industry

The combination of all these elements makes this card incredibly meaningful

Bill is not a fancy or intimidating trainer