- In the Cycling sport, you can see oil slicks on the track, even though only electric cars are allowed on Wuhu Island.
- Rusty chains? Gotta oil them somehow.
- It's from the planes you keep crashing into the island, all that's left is a grease smear.
- Speaking of which, if electric cars are the only vehicles allowed, what are the planes running on? You can plainly see exhaust coming out of them.
- They probably make an exception for planes because there aren't as many as there are cars, and all-electric planes haven't exactly taken off yet in the real world.
Headscratchers / Wii Sports Resort