Hi Google is not helping much here so help please!!
Ive been searching for this anime for years but i cant find it!! It was shown in the early 90's on Chinese channel so i never got the name of it... Cant really remember much but here some stuff that happens in the anime:-
The main character is a young boy who plays like an ocarina
He finds mecha in a mountain (i think)
When he first finds the mecha he rides on its shoulder and it only walks when he plays the ocarina
All mechas i remember can be entered from the torso of the mecha (entry point to mecha is through like an orb?) And be controlled within the mecha.
There was also a girl character with pink hair who the main character meets (i think their first meeting is when girl is skinny dippin and he catches her whiles skinny dipping lol)
Pink hair girl characters brother is on the evil side
All the bad guysbhave a tear drop on their face
And that's all i remember :)
Hope this is enough information!!