I was trying to make this set
Belly Drum + 3 Attacks
Move 1
Belly Drum
Move 2
Fire Blast
Move 3
Earthquake
Move 4
Rock Slide
Hidden Power Flying
Item
Salac Berry
Nature
Lonely
EVs
252 Atk
120 SpA
136 Spe
The strategy for a Belly Drum Charizard lacking Substitute is generally to switch into weak attacks, such as Skarmory's Drill Peck or Blissey's Seismic Toss, lowering its health enough that Salac Berry activates after Belly Drum. Alternatively, one could Belly Drum on a switch at full health, fire off attacks without the Salac boost, and switch out against faster foes. To switch in and Belly Drum a second time, however, you will have to switch Charizard in on a predicted Skarmory or Forretress switch, or on a Choice Band user locked into Earthquake.