I don’t know how much you really want tokens to be added as a feature to claim/redeem pixelmon, but you could use something like HuskyCrates. In order to run/use HuskyCrates, you’ll need the HuskyUI. I’m in no way associate with them, but I use this plugin, and it’s great. It offers “keys” to open chests, which have editable chances for certain items in the chest/crate. It offers particle effects, entity crates, and configurable crates, so I don’t see why you can’t use it instead