The Mystery Cartoon Character Game, ongoing-ier.

I know this one too, but I'm going to be busy so I'll pass for now.

I thought someone would get it by now, so here are the last three clues:

4. My animated debut was in 1967.

5. At that time, my late voice actor also voiced a tiny superhero, as well as three characters on another show from my studio that aired on a rival network.

6. I was brought in as a substitute for another teen sidekick for whom my studio was unable to get the rights.

Fine, I'll take care of this one. This is Speedy of the Teen Titans.

Right you are, Glowworm. Now to explain:

1. He shares his name with Speedy Gonzales.

2. He's the sidekick of the Green Arrow.

3. His first three team mates were Aqualad, Kid Flash, and Wondergirl.

4. He debuted in 1967, in the "Teen Titans" segment of "The Superman/Aquaman Adventure Hour."

5. His voice actor was the late Pat Harrington Jr, who at that time also voiced the Atom on the show, as well as Lars, Alec McEwen, and Torg on "Journey To The Center Of The Earth," which aired on ABC. The other show aired on CBS.

6. He was used as a substitute for Robin, who wouldn't be animated by Filmation for another year.

So it's your turn once again, Glowworm. Good job.

Thanks, I wasn't ready to post the answer the first time because I was a bit busy and couldn't think of a new character. I've got one now though.
1. I have been seen in animated form for a commercial based upon a children's game of the same name.
2. The object of the game is to collect the most butterflies.
3. The game came out in 1993 and is still around today, with a spin off game, and a female version.

It's Elefun, the elephant. The female version of the game is called Belefun.

Yup--cute little guy, I never actually played the game but I grew up on the commercial--which can very easily get stuck in your head. The spinoff game, by the way, is the Elefun Busy Ball Popper.

I never played the game either, but I kinda remember the commercials.

I'm a supervillian without a superhero.
I tried to make my own hero, but that backfired.
Now, the rolls are reversed.

Huh, not until now have we fielded Megamind as a Mystery Character. This arch villain of Metro City started out with Metro Man as his nemesis, but when the hero was presumed dead, Megamind found that being a dictator got boring, fast. Just to keep himself amused, Megamind created Titan as a foil, but Titan outgrew that role, which compelled Megamind to become a superhero to thwart his renegade creation. Love the backstory as told by Megs: "He'd [Metro Man] win some, I'd almost win others ..."

Yep, it's the now tapped vein of Megamind. You now have full control of the board!

Bravo for finding that untapped vein, Saltyboot. Now it's up to me to find virgin territory. Ah, here's one! (Euw.)

1) This character has appeared only once to date in a feature film. Some of the feature is animated, most of it isn't, but let's focus on the better part.

2) Though he started out as a cel-painted, two-dimensional cartoon character, this haywire renegade developed into a rendered, three-dimensional cartoon hellion that gets loose in the real world.

3) On the plus side, this character got Title billing. On the minus side, this character's movie bombed badly in theaters, and holds an abysmal score on Rotten Tomatoes.

Well, I'll have to look into this one. I'm sure I'll find the answer somewhere.

Could this be Monkeybone of the movie of the same name? This movie did indeed flop in theaters and got poor reviews.

It could be, and it is. This is Monkeybone, a cartoon character created by Stu Miley, played by Brendan Fraser. Monkeybone starts out as a cel-painted cartoon character being pitched to producers and broadcasters. They like him, since Monkeybone is a monkey with Screwy Squirrel's comic mayhem. An accident bring Stu into the cartoon world, which Monkeybone exploits to escape into Stu's world. Box Office Mojo estimates it took $75 million to make this hybrid movie, which recouped only $5.4 million in ticket sales. Ouch.

But let's not dwell on this loser monkey. I'll attach a fresh +1 to Glowworm's tally sheet, and let her take control of the game board.

Yeah, I used to see commercials for this movie back in seventh grade. It looked horrible.
Anyhow, I will be a bit busy today, so please stand by until I can find some time to post a character.

I got one now.
1. I am a super hero--although there has never been an explanation as to how I acquired my super powers.
2. I also happen to be a lab animal. My human caretaker has no idea I am a badass superhero.
3. You know how most superheroes have special signals or hotlines to call them when they're needed? My partner communicates to me through telekinesis.

Now I'm really stumped. I hope someone else can get it.

This sounds like Monkey from the Dial M for Monkey segments of Dexter's Laboratory.

It is indeed Monkey from Dial M for Monkey, although Monkey sometimes had some roles throughout episodes of Dexter's Lab as well.
1. Monkey is indeed a superhero--but we never learn how the heck he became a super powered monkey.
2. Dexter owns Monkey, and despite being a super genius, has no idea Monkey is so incredible. He does actually learn of Monkey's identity in "Last but Not Beast" but of course, like in all cartoons where a secret like this is finally found out, Monkey erases Dexter's memory of this.
3. Batman has the Bat Signal, the Powerpuff Girls have the Hotline, Monkey gets his orders through Agent Honeydew, who has telekinetic powers. "Monkey, hear my thoughts."

Sorry for the delay - my wife has been unwell, so my time has been a bit limited.

1) My father takes offence at the wedding plans.
2) The Giant proposes a solution.
3) I save his life, at the risk of my own.