If Pokémon didn't exist, I would have spent my money on other things rather than Pokémon cards, toys, games, etc.
I would probably be more into Magic or Yugioh. I'd also probably own a few more reptiles. I would also play other games more frequently, such as Zelda, Mario, and other Nintendo games. I would also listen to more music. Finally, I would not sit on my computer all day lol. I would also go to the gym more frequently.
Also, if it didn't exist I wouldn't be teased by the people at my school for liking it, but I really don't care what they think in the first place. Without it, I wouldn't have met many friends, whether it be via the internet or via tournaments.