| MissingNo. | |
| Screenshot Size: | 175 |
| Screenshot Alt: | A boy wearing a baseball cap seen from behind looks up at a lower-case "d" shaped character with a scrambled appearance. Below, a text box says "Wild MISSINGNO. appeared!" |
| Screenshot Caption: | A player encountering MissingNo. in Pokémon Red |
| Discovered: | May 1999 (first documented by Nintendo Power) |
| Affected Hardware: | Game Boy |
| Affected Software: | Pokémon Red and Blue |
| Website: | MissingNo. on Nintendo.com |