Crossovers
- None

Cameos/References
- Dinosaur Comics - T-Rex has a job adverticing for dental hygiene from a poster in the Doctor's office! Issue 1, page 6
- Shortpacked! - Among the many ninjas at the gathering, we also spot one Mr. Ninja Rick! Issue 12, page 5

Dr. McNinja cameos/references can be found in:
- Bunny - First there was Dr. McNinja. Now we also have... Dentist MacNinjaBunny! 03-02-2006
- Shortpacked! - No matter what, Dr. McNinja is counted as a real Ninja in the Ninja Mall! 31-08-2006
- Plugged Nickel - Irving has come for Halloween in the full uniform of Dr. McNinja! 31-10-2006
- Flaky Pastry - Our friendly Neighbour walks the streets as Dr. McNinja this Halloween! 31-10-2007
- David's Oekaki Artworks - With Dr. McNinja as your personal doctor, prescription for love is kicked in! 14-02-2008
- I Was Kidnapped By Lesbian Pirates From Outer Space - So Dr. McNinja is a Gay Pirate from Mars? 11-03-2008
- Flat Feet & High Heels - Dr. McNinja would have made a good serial-killer... it's the coat that does it! 12-09-2008
- Least I Could Do - The view through Rayne's window is taken straight from Dr. McNinja on adventures! 27-03-2009
- Least I Could Do - Having spotted another martial arts opponent, Dr. McNinja jumps to attack! 10-04-2009
- BffSatan - If you are coming from the future to prevent things, Dr. McNinja is not the worst backup! 01-04-2009
- The Crossoverlord - ! Allways the Doctor, McNinja comes about to show his proper respect at this occasion! 11-08-2009
- Better Than Cheeses - Dr. McNinja looks down from the ceiling to see what the cry for celebration is about! Strip 737