You only really want mana dorks early, ideally turn one and Mentor can't do that
Once attacked with the attack points of another Pokemon, the former will lose some of its heal points
If you want a deeper breakdown, read our full Play Boosters vs Collector Boosters guide
Most Toxic creatures are only Toxic 1, such as the iconic Phyrexian Mite tokens -- although there are some fun outliers, like Tyrranax Rex, which has a brutal Toxic 4
If you didn't put any cards into your graveyard when you manifested dread (perhaps because your opponent controls Leyline of the Void), Paranormal Analyst's ability will still trigger, but you won't be able to put any cards into your hand when it resolves
You can draw most of your deck with Ad Nauseam, use Lion's Eye Diamond alongside Underworld Breach to generate loads of mana to recast cards from your graveyard, and use the rest of your cards in your graveyard to draw out your deck that way