息子はピカチュウも大好きだから、いろいろなピカチュウの商品が持っています
My son loves Pikachū, so

he has various Pikachū merchandise.

このピカチュウぬいぐるみとタオルを前のクリスマスに貰った
He received this stuffed Pikachū and towel last Christmas

今日、そのピカチュウぬいぐるみを学校に持って行った
Today he took that stuffed Pikachū to school.

ところで、ポケモンのゲームはまだ息子に難し過ぎそう
By the way, it seems Pokémon video games are still too difficult for him