It's difficult to say, though it could be true as with the case of 101 Dalmatians on the V,Smile from old announcement documents from the site talking about the plans to bring the franchise to the console.
That document can be found here, mentioned in the "V.Smile Pocket" section. You can quickly find it by using CTRL+F and typing in "101 Dalmations" in the text field that appears in the corner of your browser. I think that proof of this Bumba game can be discovered by finding a similar old document from the Spain/French side of VTech via the Wayback Machine site.
The time it took to find just that info for the 101 Dalmatians game took 4 hours of straight digging, so these hunts will take a while.
