With the Super Smash Bros. Ultimate 2.0.0 update that came Tuesday evening, some players are experiencing difficulty when trying to redeem the long-awaited Piranha Plant to add to their roster.
Players are having trouble with both redeeming the code from Nintendo or just finding it in their email, along with having Piranha Plant wipe out their save files entirely after they used it in the game’s All-Star Mode.
Nintendo support posted an entire FAQ on how to troubleshoot unlocking Piranha Plant without having to call in, as their call volume is so high that people are reporting error messages.
Source: IGN.com Smash Bros. Players Encounter Piranha Plant Redemption Problems, Corrupt Save Files