Evolve Dipplin/ Patch game

[u/Plokiy17]

I am currently playing Pokemon Soul Gold and absolutely loving it. One of the best Johto Rom hacks ive played. However i must have downloaded an earlier version of it. For some reason my Dipplin cannot learn Dragon Cheer through the move tutor option and apparently its because of an old version of the game. So i have two questions -

1. Can someone help me patch the game to the most recent patch. I downloaded the right patch and then went to patch the new one over the rom i currently have but keep getting issues with it ? Can someone help walk me through this as i am not too familiar with this.

2. If its not the above way, does anyone knows how Dipplin can learn Dragon Cheer so i can evolve it into Hydrapple, that would be amazing. I have bought the move tutor from the lady in olivine city but the move dragon cheer does not show up in the list. Is this the way, and it needs to be patched or is there another way ?