Inspired by
sophia_helix, An Incomplete List of Things I Call Tiberius That Are Not His Actual Name:
The Worst
Dr. Cuddle/Mr. Bite
Bug
The Bug
Bugger
Buggy
Buglet
Buggerton
Bugasaurus
Biteasaurus
Jr. Cat
Fatty
Piggy
An Incomplete List of Things I Call Cupcake That Are Not Her Name
Pretty
Prettiest
Prettiest and Best
Angry
Your/Her Highness
Your/Her Majesty
Your/Her Grace
Queen of the Gnomes
Most Important
Judgy
Sr. Cat
Loaf
Also, Spoiler Alert:
Baby Tiger Cub = Ridiculously Cute