Simon Church came off the bench to help Wales secure their place in the knockout stages of Euro 2016.
Chris Coleman’s men took the lead after only 11 minutes through Aaron Ramsey’s delightful chip, with Neil Taylor doubling their advantage soon after.
Bale sealed the convincing victory in the second half with his third goal in as many games before he was replaced by MK Dons striker Church with seven minutes to play - Church became the first Dons player to feature at a major international tournament while at the Club.
Former Dons Jonny Williams and George Williams were among the substitutes for Wales.
The result means Coleman's side will face a third-placed team from Group A, C or D in the Last 16 on Saturday evening.
Also in action on Monday evening was Dele Alli, who was brought on as a substitute in England’s goalless draw with Slovakia.
The midfielder, who played every minute of England’s first two matches, was rested for the group finale but replaced Adam Lallana on the hour mark as the Three Lions searched for a goal that would see them qualify for the knockout stages in first-place.
That goal, however, didn’t arrive although Alli did come closest with a first-time effort which was cleared off the line by Martin Skrtel.
With the draw, England end their group campaign in second place which means they will face the runners-up of Group F in the Last 16. Their match is scheduled for Monday night.