I obtained a Level 47 Ho-oh, and based on leveling it to 100, going to the Move Relearner, and past games, its full level-up data is likely to be the following:
Start - Whirlwind
Start - Weather Ball
L9 - Gust
L15 - Brave Bird
L23 - Extrasensory
L29 - Sunny Day
L37 - Fire Blast
L43 - Sacred...