First - The drop section. The Collector CAN drop materials, but the drops section says "none". (Currently, the only material drop I know about is Spark Plugs)

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Second - The "strategy" section. What mostly bothers me is "When it uses its explosion ability, three Retrodes and two Gun Puppies appear to support it.". I think that it should be changed to: "In The Collector, it has very high defense, but briefly lowers its guard when stunned by its own explosion ability. Use this as an opportunity to strike. It will start off the battle using Goo Grenades, then switch attacks each time it uses its explosion ability. When its health is reduced to _____, 3 retrodes will appear to support it and 2 red searchlights will turn on - When it reaches _____ health, 2 gun puppies will appear and 2 more red searchlights will activate. Supporting enemies will give no drops when defeated and are destroyed when the Collector goes down, so there's little point in fighting them.