Heres proof they are both hacked
Sassy Raikou IVs: 22 / 17 / 26 / 22 / 9 / 1
No possibilities.
Bashful Entei IVs: 23 / 6 / 0 / 0 / 0 / 0
PID: 1962089243 [74F31B1B] | Created by Method 2 | Gender Number: 027 | Ability: 1
1 possibility.
Copied from Official Thread on Smogon
As you may or may not be aware, a member of the legendary trio from the Gold/Silver/Crystal era is available to you after obtaining the National PokéDex. In the vein of your Rival's starter, the legendary you are able to obtain has a type advantage over your starter Pokémon. This means if you chose Bulbasaur you can get Entei, if you chose Squirtle you can get Raikou, and if you chose Charmander, you can get Suicune. This legendary is unlike the others in two ways. The first of which is that it wanders the grasses (in Suicune's case, waters as well) of Kanto.
The second way the legendary G/S/C trio is unique is that their nature and IVs are set upon fixing Celio's Machine on One Island. In addition to the fact that their IVs and nature are set, the IVs of the trio are victims of either an odd programming decision or a glitch; only their HP IV can be random, while the rest are set extremely low (typically in the 0-5 range). Despite what others may tell you, it is impossible to capture a competitive member of the G/S/C legendary trio in Kanto. This is due to the programming, not "luck", so it is a fact that these particular legendaries will always have bad IVs, and very often poor natures as well.
Should you really want a good Raikou/Entei/Suicune in the third generation, your only option is to soft reset for them in Pokémon Colosseum for the GameCube (also compatible with the GCN's successor, the Wii), or obtain them at a special Nintendo event.