"ISO" usually stands for International Standards Organization, but in the context of gaming, it's more likely referring to an ISO file, which is a disk image used for software. So, "Mario Kart Wii Deluxe 80 ISO TOP" might be a modified or enhanced version of the original Mario Kart Wii game that fits on an 80 MB (or 80 MB is a typo for 80 GB?) ISO file. However, the original Mario Kart Wii game is about 100-150 MB, so maybe 80 MB is too small. That could be a mistake. Alternatively, could it be part of a larger discussion about pirated copies of the game?
Another angle is that maybe "Mario Kart Wii Deluxe" is a hypothetical or fan-made version that's not officially released by Nintendo. It could be a mod that users create themselves using tools to customize the game. "TOP" might be a specific modification version, but I don't have information on such a specific mod.
Sources: Nintendo, IGN, Speedrun Forums
"Deluxe" here might suggest that it's a modified game with more features, like extra characters, courses, or items. "TOP" might be part of a version name or platform identifier, though I'm not sure. It might be a modded version or a fan-made version of the game.
Wait, is there an official "Deluxe" version of Mario Kart? Or is this a community term? For example, Mario Kart 8 Deluxe is the official re-release for Switch, which includes Mario Kart Wii content. Maybe the user is conflating Mario Kart 8 Deluxe with the Wii version. If that's the case, I need to clarify that Mario Kart 8 Deluxe is different and available legally.