Mario & Luigi: Paper Jam (https://www.completionator.com/Game/Details/22346) is missing from the Paper Mario franchise.

American Dragon: Jake Long - Attack of the Dark Dragon (https://www.completionator.com/Game/Details/26972) and American Dragon: Jake Long - Rise of the Huntsclan (https://www.completionator.com/Game/Details/26971) are both just called American Dragon: Jake Long in PAL regions.
Also, the PAL PS2 version of Bad Boys II (https://www.completionator.com/Game/Details/16241) has the NTSC name listed.

The Sims: Livin' Large (https://www.completionator.com/Game/Details/8221) is known as The Sims: Livin' It Up in PAL regions.

Most of the above have been updated; however, @moho_00 will have to update American Dragon: Jake Long - Rise of the Huntsclan.

American Dragon: Jake Long - Rise of the Huntsclan has been fixed!

Cooking Mama: Cook Off (https://www.completionator.com/Game/Details/18967) is just known as Cooking Mama in PAL regions.

Also, is it possible for a Da Capo/D.C. franchise list to be created?
Here are the entries in the series:
D.C.: Four Seasons (https://www.completionator.com/Game/Details/69035)
D.C.: Da Capo (https://www.completionator.com/Game/Details/26452)
D.C.: Da Capo II (https://www.completionator.com/Game/Details/26453)
Da Capo III R (https://www.completionator.com/Game/Details/46956)

Cooking Mama has been updated and a franchise has been added to the games you listed. :)

The following games are missing from the Totally Spies franchise:
Totally Spies! 3: Secret Agents (https://www.completionator.com/Game/Details/71762)
Totally Spies! 4: Around the World (https://www.completionator.com/Game/Details/71763)
Totally Spies! Mon Agenda Secret (https://www.completionator.com/Game/Details/71572)

Also Bad Boys II (https://www.completionator.com/Game/Details/16241) still has the incorrect PAL region PS2 name.

@Cheesyben I've fixed all of the above.

Trine 5: A Clockwork Conspiracy for Xbox Series X - https://www.pricecharting.com/game/xbox-series-x/trine-5-a-clockwork-conspiracy
You Suck at Parking [Complete Edition] for PS5 - https://www.pricecharting.com/game/playstation-5/you-suck-at-parking-complete-edition

@stufio Both should be working now. Also updated the entries while I was at it. :)

Metal Max Xeno Reborn for PS4 - https://www.pricecharting.com/game/playstation-4/metal-max-xeno-reborn

@stufio - That one should be fixed now!

Fort Solis for PS5 - https://www.pricecharting.com/game/playstation-5/fort-solis

The game "Mario & Luigi: Paper Jam" (https://www.completionator.com/Game/Details/22346) is not included in the Paper Mario franchise listings.

Fixed!

https://www.completionator.com/Game/Details/19591

Stone Protectors has had an aftermarket Mega Drive/Genesis release based on a cancelled prototype in recent years. Both digitally and also physically by Columbus Circle in Japan and Strictly Limited.

https://segaretro.org/Stone_Protectors

https://segaretro.org/Stone_Protectors_(2022)

https://www.strictlylimitedgames.com/products/stone-protectors-genesis-mega-drive

https://www.columbuscircle.co.jp/products/?id=1697443137-789063&p=1&ca=49

"Natsume's Book of Friends: Hazuki no Shirushi"(https://www.completionator.com/Game/Details/78253) is missing the original Japanese title (Natsume Yuujinchou: Hazuki no Shirushi)

Also "My Next Life as a Villainess: All Routes Lead to Doom! ~The Pirate Who Summons Trouble~"(https://www.completionator.com/Game/Details/59172) is a name created by Crunchyroll for their news site before the official English title (My Next Life as a Villainess: All Routes Lead to Doom! -Pirates of the Disturbance-) was revealed. It's also missing the original Japanese title (Otome Game no Hametsu Flag Shika Nai Akuyaku Reijou ni Tensei Shite Shimatta...)

https://www.completionator.com/Game/Details/47571

Ultracore has physical releases on Genesis by strictly limited, but also a Japanese Mega Drive release in Japan by Columbia Circle

Box arts:
https://segaretro.org/Ultracore

The following also have physical releases on Mega Drive/Genesis as well as modern platforms

Demons of Asteborg:
https://www.completionator.com/Game/Details/64351
https://neofid-studios.com/products/demons-of-asteborg

Astebros:
https://www.completionator.com/Game/Details/71602
https://neofid-studios.com/products/pre-order-astebros-new-boxed-cartridge-with-printed-manual-for-sega-megadrive-genesis-i-ii-and-iii