I updated the checklist with two more listings I found on a German website, no pictures yet:
Leo Touchdown
Donnie Baseball
These two, together with the Raph and Mikey 'sports' sets are listed as DMX26.
So I'm not sure what the correct numbers are.
Meanwhile I have still not been able to find the Donnie Jump Training and Leo Skate Training sets on a website that will ship to Europe or eBay.