There's no steering mechanism to Pasha's sled.
Race leaves no tracks when he sneaks into the secret laboratory. Either that or the secret laboratory hired a terribly unobservant fellow for its security guard.
Skis and sleds take seconds to move downhill, yet take minutes if not good fractions of hours to be walked uphill. Pasha would seem to be able to sled back uphill to his helicopter, and the Quests would later seem to be able to ski back up to the helicopter as well, unless Pasha had walked back up the mountain and flown his helicopter to a lower point, which would make him a very vigorous man at that altitude.
Discovering an unconscious body at their front door does not, as it should, put the secret laboratory on high alert.
Jonny, around 04:40, refers to porpoises as "fish". Race affirms what he says, and Dr. Quest doesn't correct them. But porpoises are mammals, not fish.
Pasha Peddler's "all-American" accent does not fit the supposed Indian nationality of his character. (This could be a deliberate indicator that he's not quite what he seems.)