Johnny Test started out as the pre-existing, original test pilot episode of the show in 2004 on syndication, just before Kids' WB picked it up as a full series. While the pilot has never been released or aired, a promotional commercial in 2005 (with some scenes of the pilot and original voice cast can be seen)
- Johnny Test (debut)
- Dukey (debut)
- Mary Test (debut)
- Susan Test (debut)
- Hugh Test (debut)
- Lila Test (debut)
- Bling-Bling Boy (debut)
- Johnny Test's dog Dukey is referred to as "Poochie".
- Johnny Test's rival, Bling-Bling Boy is referred to as the "Golden Boy".
- Not to mention, he had a completely different outfit.
- Johnny Test had no red highlights on his full head of blond hair.
- Johnny Test is drawn in his Johnny Test Evolution, his first design.