There are numerous errors with it that will affect it on a legitimacy verification.
1. The ID number is 95953, which is an invalid ID number. The ID is stored in a two offset hexadecimal location, which means the range is 0-FFFF. This means, in decimal terms, the largest possible ID number is 65535. Anything outside that range is an invalid ID number, and depending on the check, may fail.
2. I don't think that it would fail simply because it was from the Unova region, as I'm sure Nintendo is planning to have the legendary dogs released on B/W in the future (considering they've released them recently on HGSS). However, you cannot have it from the Unova region at the same time as having it from Johto. If you want to have it from Johto, you will want to change the met location to something which was available in HGSS.
3. If it's from HGSS, you need to edit the hex value 0x86h to match that of 0x83h because in HGSS, there is a second value for the Pokeball. For most Pokemon/Pokeballs, the values are the same, and in the case of the Masterball, it definitely is. The reason for two values is because when trading between versions, HGSS has HGSS only Pokeballs, which would result in an error in other games, so this is a way for them to have backwards compatibility.
4. You will likely need to verify the checksum after Pokesav use. I don't know if you know much about it, but considering you're using Pokesav, Legal.exe can be used to determine if the checksum is valid or not. I won't go into details right here, but it is something you need to be aware of.
I think it may be easier to simply grab an actual event Raikou from someone, or go yourself (depending on your location). North America is currently getting a Raikou event at GameStop actually, which ends on Sunday and then becomes Entei I believe (all three are distributed at different times). You could probably get one from a trader quite easily if you tried, they will be in high quantity very soon.
PS. The reason I know so much is because I do legitimacy verification services for events, have been collecting events for 3.5 years, and have created programs to display information from .pkm files (similar to the screen you have from the edit form of Pokesav).
