"Cancelled" is a term used in the modern context to describe a situation where a person or product faces significant backlash and is subsequently removed from public view or support. While fictional characters can certainly be "cancelled" within the context of their own stories, in real life, octopuses don't have the same social standing as humans and aren't subject to such cultural trends.
Could you please provide more information about the "Oswald the Octopus" you're referring to? Perhaps you could tell me:
* Where did you hear about Oswald the Octopus?
* What was he known for?
* What was the reason for his cancellation?
Knowing more about your reference will help me understand what you're asking and possibly give you a more specific answer.