I did a run for a ending on this game and was going to submit it until I realized they dont have a category of speedruns for the ending I went for.

What's the ending exactly? Grass grow ending was a thing before but it was just too short to be competitive enough as a category. There's also one ending that is way too similar to one of the endings so it was cut out as well.

the ending im talking about is the bonzi buddy ending

If you mean the bonzi ending, that's already the main category. If you mean the ascension ending, that's a no-go cuz the route would be the exact same as True Ending Out of Bounds.