Four months ago, I created an userbox for Waddles for using it to my profile: Template:User Waddles. Its appearance is like:

S1e14 make the pig talk!
This user likes Waddles because... no specific excuses.

And its usage is as same as all the other similar templates in Gravity Falls Wiki:Userboxes.

It has been months, yet, I am the only user of the userbox. Seeing that how important Waddles is in the show, I recommend that you can add it to your profile! In fact, I am sure almost every Fallers like this adorable pet pig.