.. Wipe out cat allergy once and for all!

Travel to the past and make sure cats don't grow fur, ever again.

You know what animal cats are descendants of?

Tigers. There's a tiger in the past. ( At the shack of Dr. Abraxas. )

Make it lose its fur. You know, inverted fur growing.

InvertaTron did just become ready!

Hair growth cream, of course. ( Kloot will find hair growth cream from the barbershop. )

Now, apply it to the tiger in the past. Directly into its blood stream.

Use the syringe you find from the doctor DR-13's office.

Use a blow gun.

Put the syringe into the bamboo stick and use that on the tiger.