I will admit that the translation is not perfect, and that more literally the phrase "エクセルスートのスパイクも変形。" would translate to "The Excel Suit of Spike also transforms." But as that's wonky English, it is not too much of a stretch to rephrase this English translation to sound more natural in a native English tongue, resulting in "Spike's Excel Suit". Plus, considering that the rest of the packaging and instructions all refer to the suit itself as the primary marketed subject of the set (aside from Bumble, that is), it would not make sense for that one little image caption to treat Spike as the center of attention against all of the other packing material doing so for the suit.
As I noted previously, there is a description in the instructions that, for any other MP toy, would normally be a character description. But in this toy's case, it's a description of the suit itself, rather than the character inside it.
Though it does mention both Daniel and Spike, it only mentions them as examples of those who have worn the suit.
And the accompanying cartoon image of its vehicle mode shows Daniel inside it.
Plus, the line art in the Official Masterpiece Guide Book unambiguously shows Daniel as the one inside the suit:
With all this info stacked towards Daniel being the one in the suit, and with the toy itself officially being marketed by its own packing material as not even a character but instead a piece of equipment just named "Exo-Suit", it seems highly illogical that that one image caption should be interpreted as intending to contradict the rest of the set.
He may have intended for it to be Spike, but the end result goes against his intentions. We think there must have been some sort of a slip up during the design process that resulted in the toy's head looking more like Daniel instead. But either way, authorial intent is psuedo-official at best. After all, the toy's official name is "Exo-Suit" anyway, so as far as the toy itself is concerned, its true identity is the suit itself, rather than the person inside it.
