In some cases, you need to do some stuff manually.
Delete "Polar" from First Name. Type it in the Last Name field in front of "Bear". Click Add.
What I've been doing for the other Mascot PIDs is go into the profile page (edit info page), put "[Team Name] Mascot" in full name, and select N for Non-Fictional Human. Click the Edit button at the bottom of the page and you're all set.
-- Dan --
Note: Please see my profile for more info regarding trading (section updated 3/4/2024). I have added a large portion of my inventory to the site, and currently have trading turned on (details are in my profile).