When Gokaiger came out in 2011, it was heralded as the 35th anniversary series of Super Sentai. The gimmick was the 6 gokai rangers could use ranger keys to transform into rangers from the previous sentai seasons.
So, here's one of the keys released in the 3rd Series of Candy Toys. Basically, it's a little cardboard box with Princess Shinken Red on it and a picture of the key. Inside is a little packet of hard candy and a ranger key. Now, unlike blind boxes, you KNOW what you;re getting inside these.
The back of the box shows the other figures in this series. Which are Beet J. Stag, Gokai Christmas, Princess Shinken Red, Time Blue and Mammoth Ranger. On the bottom of the box, it shows how the keys work with the Legendary Mobilates, which was released at the time.
Inside the box, we have the ranger key itself and a small sticker sheet. Yep, you have to put the final two stickers on. The large black one goes between the legs and the red one goes on the back. The ranger key is much larger than the US version and doesn't flick upwards as easily or fast.
Here;s the finished key with the stickers applied. It doesn't take long to do and apply just fine, even 4 years later. Sadly, I don't have a mobilates to test it with.
You can find these keys very easily on the secondary market. Costs wise, they're about £10 per key in a boxed condition.