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We already have a topic for all illegal combinations, and Charm + Surf is listed there:
https://www.smogon.com/forums/threads/rby-and-gsc-illegal-movesets.78638/#post-8725956
I don't know why it wasn't implemented in showdown though.
Here's some history on the Thunder x Thunderbolt topic: people used to run Thunderbolt as the standard during the early years of the meta. Stall was the meta standard and offense was not well explored. Thunder started being used on Pokémon who uses the Electric-type move as coverage, like...
I actually made both versions, with and without the tradebacks, for each cup. I just decided to post the one without tradebacks because a feel like some people don't like using tradebacks, but I would had no problem in add both versions to the first post.
EDIT: I updated the first post adding...
I know this thread. I even posted there lol. It's not the same thing. That thread is supposed to be for competitive play, human x human. Mine is casual play, to try to beat the game. The approach is different.
This is something I've been working for the longest time, and I would really appreciate some insight from Gen I specialists. I wanted to created a movesets list for each Cup in Pokémon Stadium. Bear in mind though those are supposed to be used to beat the game, not to use against other human...
A New Take on Pokémon Stadium's Pika Cup
Ok, I don't think this will become a meta, but I found interesting and decided to post.
The Pika Cup rules currently don't allow tradebacks with GSC, so there is another meta exclusive for those who like to use tradebacks. But my take here is something...
The Red Gyarados in the Lake of Rage is always male. It has a pre-defined set of DVs, and gender in Gen 2 is also defined by DVs (the Attack DV, specifically).
The best place to hatch eggs in the game is the Ice Path. Each “slide” count as a bunch of steps. So just keep pressing back and right and you can hatch them without even have to look at the screen.
This is the damage calculation process for the second generation. The game performs each step in the following order.
In battles in which Exp. Points can be gained, the badges have the appropriate stat multiplied by 9 and divided by 8 for Pokémon controlled by the player (the Zephyr Badge...
The problem is, in Pokémon Showdown, the values for EVs in GSC are different from the real games. Also, the paste in Showdown always doubles the value for IVs. Where it says 2 ATK IV, it actually is 1 ATK IV (the teambuilder have this correct).