That’s not how you’d summon him that’s like saying dark magician and Tim wizard fuse to create dark sage
It's ridiculous to see this as fusion monster. Time Wizard is not even any part of it, he just make Baby Dragon's age faster. I mean, if you fusion summon Thousand Dragon using Time Wizard and Mystical Sheep as its materials, why it's still Thousand Dragon instead of Thousand Sheep?
But since it's an old card, well I think he needs a retrain.