Well..everyone considers a monster differently. for instance, in order for a creature to be a monster, it has to be bigger than an average person (about 5 feet tall) and definitely has to be stronger than you.
You do.
a monster my opinion is they are animated spirits because you can control them and you cant control monsters (not including pokemon).
It doesn't matter who 'owns' the monster, all that matters is the current controller. If I steal your monster, and attack your other weaker monster with it, it's you who takes the damage because 'your' monster is 'mine' at the moment, no different to my other monsters. If you attack the stolen monster with a stronger one, the same applies, I control the weaker monster, so I take the damage.
A card you 'control' is something on your side of the field, be it a monster, spell or trap, and it can be something the opponent owns, but you've taken control of by whatever means.
No it does not. Brain control is used to either switch its position on the controller of brain control's side of the field or tribute this controlled monster or attack with.
Yes, they 'control a monster' if they have one or more. The wording for an effect that can only be used if the opponent has one monster is "controls exactly one monster".
If they only control one monster, then it's very easy to work out which monster of theirs has the highest DEF for Heartfelt Appeal to let you take control of.
No, control of the Equip Spell card itself does not change, nor does it move. It remains on the same side of the field and equipped to the same monster, unless the control change made the monster an invalid equipping target.For example, if the Spell Creature Swap targets a monster equipped with Ring of Magnetism, Ring of Magnetismwill be destroyed.However, if the Spell Brain Control targets a monster equipped with Flint, Flint will stay on the same card zone but still equipped to the monster.
Yes. With the Continuous Spell Dragon Mastery (described in related link) in play, you can select 1 face-up monster you control once per turn, and equip it with 1 Dragon-type Dragunity monster from your hand. Also, each monster you control that's equipped with a Dragunity monster(s) gains 500 ATK.
Yes. Alien Hypno's effect states "take control of it while this card is on the field". If Alien Hypno is removed from the field, you no longer control the opponent's monster and it is returned to them.
Obviously Captain Amercia because he has more control. Hulk is an out of control monster
Yes. It says if they control 'a monster', not '1 monster only'. If they have two or three monsters for example, then it is true that they control 'a monster'. Compare to the wording on Dark Armed Dragon, who looks for three, and only three Dark monsters.