This isn't a glitch in Nat Dex or Showdown!. You can read the "Changes" part for the moves in our site, it mentions them having their accuracy, power, pp, etc. being changed. So, if they were hacked into SwSh, they would have same power, accuracy, etc. as listed in Showdown!.
In Generation 8 the base power of Baddy Bad was reduced to 80 and accuracy reduced to 95%, however the move is not actually available in-game.
In Generation 8 the base power of Bouncy Bubble was reduced to 60 and PP increased to 20, however the move is not actually available in-game.
These are some ones for example. You can check the page for each of Eevee-S' moves, it does mention the change in Gen 8.
Hope this helps!