"Mystery Tales: Time Travel" Not a Real DS Game — Likely Confused with Layton, Radiant Historia, Ghost Trick, or 999

No game titled "Mystery Tales: Time Travel" exists for Nintendo DS. You may be misremembering:

• Mystery Case Files series (Big Fish Games) — hidden object, some on DS (Ravenhearst, Dire Grove)
• Professor Layton series — puzzle adventure, time travel in Unwound Future
• Radiant Historia — DS RPG with time-travel mechanics
• Ghost Trick: Phantom Detective — time-rewind puzzle mystery
• Nine Hours, Nine Persons, Nine Doors (999) — visual novel, time-loop themes

If you recall plot details, art style, or a character name, I can help pinpoint the actual title.