Question marks

Question marks are often used to indicate things in the Pokémon games that are unknown:

• The Template:Type2.
• A form of Unown.
• The Pokédex number of an obtained Pokémon not in a regional Pokédex.
• The ID number, OT name and National Pokédex number of a Pokémon egg.
• The temporal rival's name in Pokémon Gold, Silver, and Crystal until the player gives him a name.
• Glitches:
  • ?????, a Glitch Pokémon appearing in Generation II.
  • ??????????, another Glitch Pokémon appearing in Generation III.
  • ?, a Glitch Pokémon that was used as filler for old Unown data in Generation III.
  • The description of several glitch items, such as Teru-sama.
  • Missingno.'s classification in the Pokédex.
  • The ?-type, a glitch type in Generation I and the main type of pPkMnp.