There is a 5% encounter rate, so it may take a while to find a Pichu. You can also hunt for Shiny Pokémon.
You can find these in Festival Plaza. [3] X Research source
You can find a Soothe Bell in the Royal Avenue Shop on Route 3.
Try to seek out what is weak against your Pichu for battles. Pichu is an electric-type Pokémon and is strongest against water, and flying types, like Squirtle and Pidgeot. Fighting water-type Pokémon means your Pichu has a higher success rate, meaning you will gain experience faster. [7] X Research source Avoid fighting Pokémon that are strong against your Pichu. Pichu has a weakness against electric, grass, and dragon Pokémon, like Dragonite, Bulbasaur, and Voltorb.
If she says, “My! It feels incredibly close to you! Nothing makes it happier than being with you,” then your Pichu will evolve the next time it levels. If she says, “You clearly love your Pokémon, and you must spend a lot of time together,” your Pichu is close to reaching maximum Happiness, but not quite ready to evolve.
Make sure your Pichu’s Happiness level is maxed or it will not evolve. Affection is different from Happiness. Pichu will not evolve with max Affection alone.
You can use your new Alolan Raichu to defeat the Elite Four.