Super Mario - With the Mario Tennis Aces: Special Demo, you and three friends can try out Yoshi's new co-op challenge. Collect enough points and you'll unlock some Yoshi colours too! Download
Co-Optimus - News - The Co-Op Challenge Mode Is Back In Mario Tennis Aces
Mario Tennis Aces - All Coop Challenges (A Rank) - YouTube
The Shy Guy Co-Op Challenge is on in Mario Tennis Aces - NintendObserver
MARIO TENNIS ACES (Switch) Co-Op Gameplay Let's Play [Funsies in Our Onesies] - YouTube
Nintendo Now Working On Fix For Mario Tennis Aces' Co-op Challenge Bug – NintendoSoup
New Mario Tennis Aces Update 2.2.0 Released; Adds Hosted Matches and Offers Menu & System Changes
The Shy Guy Co-Op Challenge is on in Mario Tennis Aces - NintendObserver
Mario Tennis Aces - Version 3.0.1 patch notes - Blackally
Screen Shot 2018-09-14 at 06.12.18 – NintendoSoup
Mario Tennis Aces - Co-op Challenge: Shy Guy Train Tussle - YouTube
Mario Tennis Aces - Splitscreen Gameplay - YouTube
The Best co-op Nintendo Games to Play - TeeChu
Mario Tennis Aces Version 2.3.0 update coming later today
Mario Tennis Aces - Ring Shot co-op footage
Mario Tennis Aces 2.0 adds four new characters and a co-op challenge mode - Vooks
Mario Tennis Aces Review - Slant
Patch Notes] Mario Tennis Aces Version 2.0.0 for Nintendo Switch (Co-Op Challenge & a Colossal amount of Changes) - Miketendo64
Mario Tennis Aces and Other Great Mario Spinoffs - GameRevolution
Mario Tennis Aces Gets New Characters and Co-op Challenges - GameRevolution
Mario Tennis Aces - Super Mario Wiki, the Mario encyclopedia
Mario Tennis Aces update out now (version 2.1.0) - Doubles Class tournaments, new Co-op Challenge, much more
Mario Tennis Aces Review (Nintendo Switch) - User Review | GBAtemp.net - The Independent Video Game Community
Mario Tennis Aces having issue selecting Co-Op Challenge, will be fixed soon
NEW DETAILS and PATCH NOTES for Mario Tennis Aces Version 2.1.0! THE BEST PATCH YET! : r/MarioTennis