Mario X Meggy: Serving Up
20 parts Complete Mario and Peach find out that there is a Tennis doubles tournament, but after countless attempts to train Mario, Peach gets frustrated and leaves Mario, which upsets him. Meggy witnessed this and felt bad for the plumber. Meggy joins Mario's team and teaches him how to play Tennis, and the tournament begins.
(Cover belongs to Villaman89 on Deviantart.)
(Requested by SmeshBras123! I hope you enjoy this MXM fanfic!)