For example, at 10 cards deep into your deck, if you need X card with old Mandy your chance of finding it your first pull is around 76%, ignoring the chance of having drawn it before (which is both REALLY hard to summarize the math of, doesn't always reflect the reality of play because often times you want specific cards based on context anyway, and hurts new Mandy quite a lot, she is way less likely to have those cards in the initial 10), while with new Mandy its only 42% on the first pull and 44% on the second assuming you double drew, and 54% and 56% if you 'wide' draw, meaning about an 80% chance if your really digging

Dragonair Dragon Pokmon Source: official-artwork Source: official-artwork Genera Dragon Pokmon Dragonair 125/193 Mega Dream ex Dragonair 089/139 ex Start Decks Dragonair 148/165 Pokmon Card 151 Dragonair 148/165 Pokmon Card 151 Dragonair 182/165 Pokmon Card 151 Dragonair 071/098 Paradigm Trigger Dragonair 067/094 Miracle Twin Dragonair 064/095 Tag Bolt Dragonair 302/SM-P Sun & Moon Promos Dragonair 027/053 Dragon Storm Dragonair 043/060 Collection Moon Dragonair 132/XY-P XY Promos Dragonair 041/078 Emerald Break Dragonair 039/051 Thunder Knuckle Dragonair 003/020 Dragon Selection Dragonair 004/020 Dragon Selection Dragonair 030/040 Lost Link Dragonair DPBP#179 Cries of Secrecy Dragonair 003/068 Offense and Defense of the Furthest Ends Dragonair 035/086 Holon Research Tower Dragonair 006/015 Holon Research Tower Lightning Half Deck Dark Dragonair 011/020 Team Rocket Constructed Half Deck W -silver- Dark Dragonair 012/020 Team Rocket Constructed Half Deck W -silver- Dragonair 037/054 Rulers of the Heavens Dragonair 017/T e Promotional Cards Dragonair 048/128 Base Expansion Pack Light Dragonair Darkness, and to Light

Arceus received the most votes of all pre-Generation V Pokmon in the Pokmon Global Link promotion poll in both the Japanese poll and the international (non-Japanese and non-Korean) poll
In red it's just especially frustrating so I always try to pack a little protection
Are New Magic: The Gathering Cards Worth Anything