Possible Clues:

• Nintendo franchise
• Fun with cards
• Critters hunted in a 2016 mobile app
• Hunted ones in a 2016 craze
• "Gotta Catch 'Em All" franchise (... letters 3-7)
• Critters hunted with a hugely popular 2016 mobile app
• 1990s card fad
• Nintendo game name
• 20-year-old game franchise from Japan
• Late 1990s fad