Oh boy oh boy it's yet another fire type! I got this working after a few tries and a lot of image editing, turns out wings and tails are almost as hard as hands to get right, but this seems to have worked out okay.
Use with a strength of 0.7-0.8 with the following tags:
charizard, dragon, scalie, anthro, orange body, tan body, two tone body, blue eyes, horns, long neck, 5 fingers, wings, membranous wings, blue wings, tail, fire, flaming tail
Personally I'd just stick with the tags in the example images though, the "flaming tail" tag tends to give a character holding a torch no matter what I try, so inpainting is necessary if you really want to stay on model. This was trained on Anything V3 and I've found that SevensMix works really well since it already knows what dragons are and can get the tails and wings right, other regular base models would need more dragon components to figure it out, even Anything V4.5 fails to get it right.
There's no explicit mega charizard tag, but you can use these tags to get one out:
black body, blue body, red eyes, shoulder horns, blue fire
I also managed to get a "Hildazard" out with another lora, but that's only a trend I've just discovered and I couldn't find much artwork worth shoving in there to make it fit better. Try at your own peril since it's more of a seed hunt to get them to play nicely.
If anyone has any big issues with this then please leave a comment with them as I'm open to retraining. If there's a particular model you'd like this for that it can't work with already (try messing with prompts for detail) then I'll make another version. I will be away from home for a few weeks though and will be unable to work on this or any other loras, although I will be available for answering questions or noting requests.