It would seem as if you have misremembered the plot of Midoriyama Koukou Joushien-hen, or have it confused with another anime or manga. In the original series from 1989 there is no inter-dimensional travel - it takes place entirely in Japan. There is a manga called "Yakyuu de Sensou suru Isekai de Chou Koukou-kyuu Ace ga Jakushou Kokka wo Sukuu you desu" in which our baseball playing high-schooler protagonist in true isekai fashion gets transported to a world where wars are decided with games of baseball. There is no anime adaptation as of yet. Hopefully you can find more information with examples of scenes or characters you remember.
spam fails_task lang_mismatch pii not_appropriate hate_speech sexual_content quality toxicity humor helpfulness creativity violence