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But did you whould show a Yeti discovery? I don't think so , those 3 doggys may be sad if therie "granpa" show them to the world. Then again , this is Satoshi san mystery , maybe he use this idea and the 3 dogs whould be in Prof. Oak lab
Where did you come up with Oak having three legendary dogs? If he does, which I highly doubt he does, it has not yet been released information. So wherever you get your information...you better check your source.
The only thing that would suggest he owns them is the fact that there have been "Ookido-Hakase's Pok?mon Lectures" on Entei and Suicune in Japan (I don't know if he did a Raikou one). And even then, I highly doubt he owns all the Pok?mon he gives his lectures on.