Is There a Secret Strike Stamp in Wii Sports Resort Bowling?

There is no "Secret Strike Stamp" in Wii Sports Resort Bowling.

The stamps you unlock are earned by completing specific challenges:

• Perfect Game Stamp: Score 300 in a single game.
• Strike Streak Stamp: Get three strikes in a row (Turkey).
• Spare Streak Stamp: Get three spares in a row.

If you're looking for a specific stamp or challenge, check the in-game menu or online guides for a complete list.