I've never had a problem with that in Yellow. Just don't let Pikachu die/faint a lot, you can give it items, or haircuts/groomings. Go to Pokemon centers, and if you just go inside or outside of a building, it's mood seems to just reset.
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you start with a pikachu.................
Pikachu learns Thunderbolt at lvl 26 in Pokemon Yellow.
cos he IS!:)
Evolving PikachuPickachu will not evolve in Yellow; it will refuse the Thunderstone, but if you trade your Pikachu from Blue or Red, you can evolve it with a Thunderstone then.
yes