for mecha dog, you have to build him. you will find pieces around town by helping people.
they will give you the stuff. like a sly sensor, bewildering balancer, perplexing paw and
stuff. ask johnny (in snow fields) about dean. if you give dean a wooden stove he will
give you parts. and, get a medal in kayaking, then, you'll get parts too. have fun though,
and when you get all parts, go find the scientist guy. he will put the parts together.

ok, so i got all the parts and put mecha dog together. then we did a field test and mecha
dog ran off and i cant find him! can someone help PLEEEEEEEEEEEEAAAASSSSSE?

find the dog in the Ski Slope? Thats where i found him. hopes this will help :)

find the dog at the zoo. there's a whole in the alligator cage