Where to Buy "Theme Park" for Nintendo DS? (Doesn't Exist)

There is no Nintendo DS game titled "Theme Park."

• SimCity DS (2007) — City builder.
• RollerCoaster Tycoon DS (2005) — Port of RCT1.
• Thrillville: Off the Rails (2007, DS) — Park building + minigames.
• Theme Park World / Sim Theme Park — PC/PS1 (1999/2000), not DS.

If you mean the classic Sim Theme Park (Bullfrog, 1999), it's on PC (GOG/Steam) and PS1. For DS, RollerCoaster Tycoon or Thrillville are the closest.