But by the same standard of Rotom being legendary, that makes Aerodactyl legendary, which I do not agree with.
Also, moveset changes in heart gold are very interesting
mismagius - nasty plot
honchkrow - brave bird
feraligatr - aqua jet (+torrent+swords dance+flail+salac+endure = win)
aggron - head smash
walrein - super fang
urasaring - belly drum
Featherdance- Piplup
Magmortar- belly drum
Brave Bird- Ho-oh
Dratini- E-Speed
Quagsire- Recover
Jynx- Nasty Plot
Ponyta- Morning Sun
Absol- Megahorn
Smoochum-Nasty Plot
Cleffa- Aromatherapy
Honchkrow- Brave Bird
Cyndaquil- Extrasensory
Qwilfish- Aqua Jet
Lugia- Weather Ball, Dragon Rush
Kyogre-Muddy Water, Aqua Ring
Groudon- Lava Plume, Hammer Arm
Rayquaza- Hyper Voice, Air Slash
Hippopotas- Dig
Dialga- Power Gem, Metal Burst
Palkia-Power Gem, Hydro Pump
Giratina- Shadow Sneak, Destiny Bond
Turtwig- Stockpile
Absol- Megahorn
growlithe- morning sun
bellsprout- weatherball
mudkip- yawn
Nidoking- Head Smash
Gardevoir- Encore
venasaur- Block
and
crawdaunt - dragon dance
. . . wtf?
Nasty Plot/Baton Pass Mr. Mime OMG