there isn't one. but for explorers of the sky, a lot of people would say riolu, but hes rubbish.
I guess it depends which Pokemon you think is best. There are an equal amount of advantages and disadvantages for each possible combination of starter Pokemon in mystery dungeon, there is no such thing as a "best pair."
1. Your starter 2. Your partner 3. Kecleon or any other starter.
Obviously chimchar. better hp.
Your starter Pokemon and a friend bow I recruited Groudon with just Blastoise and a friend bow and that seemed to work (P.S. Blastoise was NOT my starter Pokemon)
i found that starting with cubone and having a grass starter is the best way to beat any dungeon
Has to be Blue, In my opinion.
It depends on what you like. Every Pokemon is different.
squirtle and pikachu will be the best
They all have their good points, but I'd recommended Meowth. Pay Day+Technician=lots of damage and money, too :)
garchomp and altaria or charmander and mudkip
I think its charmander and riolo
Well there is no best starter; it all depends on how you train it. But Cyndaquil and Mudkip are a good team. Pikachu is not very powerful. Mudkip can walk on water, and Cyndaquil can walk on lava. So pretty good team there!