I dont know but make sure your palkia is at least level 80.
level 90
Do you mean Aura SPHERE? The following Pokemon learn Aura Sphere in HGSS: Mewtwo, Mew, Lucario, Togekiss, Dialga, Palkia, and Giratina.
At level 80 it learn Aqua Tail and at level 90 Aura Sphere.
spacial rend,aura sphere,earth power,slash.
lv70 spacial rend lv80 aqua tail lv90 aura sphere. i am shire
You are not able to get Aura Sphere as a TM unless you hack. If you can't/do not want to hack then you will be still be able to get it the harder way. You can get any legendary (discluding Arceus) and level it up to level 100. When it gets to level 100 it will learn Aura Sphere. Lucario learns it at Level 34. Palkia, Dialga, and Giratina learn aura sphere at level 90.
yes. If your riolu evolves after level 37 it will not learn aura sphere. lucario learns aura sphere at lv 37
How does riolu learn aura sphere in pokemon diamond version?
No
I don't think so but palkia,diagla,garatina,lucario and some other fighting type might learn it
27 my lucario learnt aura sphere lv37
If you mean Aura Sphere, then yes.