Below are all the moves that Beldum can learn in Generation III, which consists of:
Note: The move categories shown here are based on the move's type, as was the mechanic in Generations 1-3. The moves' detail pages may show a different category for Generation 4+.
Beldum does not learn any egg moves.
Beldum does not learn any tutor moves.
Beldum does not learn any special moves.
Beldum does not learn any HM moves.
Beldum does not learn any TM moves.