Serena (game)/Other games

Super Smash Bros. for Nintendo 3DS/Wii U
Serena appears alongside Calem as a trophy in the 3DS version. They are both simply referred to as Pokémon Trainer (Pokémon X & Y). Also, one of 's alternate costumes has it wearing Serena's hat.

Trophy information
NA: ''We suppose it's possible you've missed out up till now, so let us explain: in Pokémon, you set out from your hometown on a Pokémon journey, catching Pokémon and fighting battles with them. In Pokémon X and Pokémon Y, you reach the next town and find yourself embroiled in a tale of... No, wait–no spoilers!''

PAL: ''If you've been living under a rock for some years now, let us explain. In Pokémon, you start from your home town on your own Pokémon journey, catching Pokémon and fighting battles with them. In Pokémon X and Pokémon Y, you reach the next town and find yourself embroiled in a tale of... Well, we won't spoil it for you.''