I've been searching for this anime for years, but I can't find it! It was shown in the early 90's on a Chinese channel so I never got the name of it. I can't 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 he catches her while she's skinny dipping lol)
Pink hair girl characters brother is on the evil side
All the bad guys have a tear drop on their face
Can anybody identify this anime?