- The Mario Kart Love Song. Who knew playing a racing game could be so sweet?
- In Mario Kart Wii, Sometimes if you're playing as Luigi and he falls off the track, he will say, "Thank you!" to the Lakitu who rescues him.
- In Double Dash!! When you finish the race, the two characters you chose celebrate together. While this leads to the obvious niceness with pairs like Mario and Luigi, Mario and Peach, or Luigi and Daisy, it becomes really sweet to see Luigi and Waluigi or Mario and Bowser so pleased with each other. Especially during the award ceremony.
- In the section right before the cave on Double Dash's Sherbet Land, there are two Shy Guys skating together. It's a small, but sweet sight to behold. Even better, in 8, they'll do tricks.
Heartwarming / Mario Kart