You're talking about Golden Sun for the GameBoy Advance
I am not aware of a final fantasy character named Moya. There was a character named Moya in Farscape though.
The main female character in Final Fantasy Versus XIII is named Stella.
Final Fantasy
There have been multiple characters named Leon in the FF games. Final Fantasy II: http://finalfantasy.wikia.com/wiki/Leon Leon was also an alternate-reality linked character to Squall in Final Fantasy 8. There have been other instances of 'Leon's in FF, but these are the most commonly known ones.
It is used to obtain the Guardian Force named Doomtrain.
I believe the game you're referring to is Resident Evil 4, there is a character named Ashley (The President's Daughter) and the main character Leon (Leon .S. Kennedy) Stars agent. Otherwise I don't know of any Leon besides Squall - Who goes by Leon in Kingdom Hearts, but there is no Ashley in the game that I know of. There is also a Leon in Final Fantasy 2.
Her Celestial weapon is named the Onion Knight.
The first FF film is called Final Fantasy: The Spirits Within. Though if you're thinking of watching it I wouldn't bother it's crap. It has absoloutely nothing to do with Final Fantasy except that there is a guy named Cid in it. You're better off watching Advent Children.
Evanna Lynch has a cat named Dumledore and a cat named Luna, and used to have a cat named named Crookshanks, but he died
Isaac's father was also named Isaac newton.
Yes , James Isaac "Jimmy" Neutron (Debi Derryberry) has a robotic dog named Goddard .
Tabuu is the final boss on super smash bros brawl