Does Magmar's Smokescreen effect end if the Defending Pokémon evolves?
Since Magmar's Smokescreen attack references the Defending Pokémon, by it evolving, it removes that effect.
Source: WotC Chat (2000-02-03)

Relevant cards

Note: All applicable cards may not be listed below.
COL1_60
HGSS1_70
PL3_65