None.

Frequent but mild cartoon action violence throughout. There are car chases, characters being attacked, abductions, acrobatic fightings, and more.

Robin O'Neill's catchphrase "What the hairy heck" is uttered in several episodes.

Very few uses of call names, such as "fools" and "idiots".

Except for some references to drugs in a season 3 episode, there is nothing.

Characters are put in peril throughout the series. For example: Robin nearly drowns to death in a swimming pool, Spike is nearly killed by a car crusher while inside a locked car, and many more.